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Person who suffers from brain malfunctions resulting in long useage of alcohol and drugs. Has problems speaking intelligently and has low IQ. Also suffers delusions of greatness and high self importance. Can not accept critisim and lies.
Boy is that guy a real dumbya or what?

He speaks like a dumbya. What did he say?
dumbya by sheila October 5, 2004
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an embarassment and disgrace to the United States of America. He occupied the Oval Office for 2 terms by fraudulent means. He smeared political rivals John Kerry and John McCain, who are honorably discharged and decorated Vietnam War vets.Through lies and jingoism he made the American people look like totalcretinous assholes. When he left office in early 2009 he left a neglected economy in a state of near-collapse and MANY problems for his successor to handle. Dumbya, you corrupt dumbass, thanks for NOTHING!
Dumbya is the Hideiki Tojo of America. Tojo and his cartel led Japan into dishonor, war and disaster via censorship, lies and induced panic, gross human rights abuses, propaganda and mind manipulation in a totalitarian manner. It lead Japan into WW2. Look at the 00s decade, do you see a parallel? What have we learned, Charlie Brown?
Dumbya by I Saw U2 Live Twice April 10, 2011
Related Words

Urban Dictionary Dumbass 

Someone who writes Urban Dictionary definitions about themselves, or people who they know, but who are not famous. Esp. when those definition is "*insert name here* is very cool and attractive."
Person 1: Hey! Jeremiah defined himself on Urban Dictionary!
Person 2: What an Urban Dictionary Dumbass...

Professional Dumbass

Someone who does stupid shit so often, they somehow become proficient at doing it well
Stan is a professional dumbass, he keeps getting himself out of stupid situations
Professional Dumbass by Garlic S August 25, 2020

Dumbassness 

A non communicable disease that tends to affect young adults but may be noticed in older individuals who continue to be carriers for many years to come.
It was out of sheer dumbassness that he opted to get drunk and get into an arguement with a cop...
Dumbassness by nachomama April 17, 2012

Dunbartonshire Dumbarton Complex

Dunbartonshire Complex means having that state of mind thinking association with or living with people from Dunbartonshire, Scotland makes one dumb.
The Kiltbearers were aghast by Oprah after she showed signs of having Dunbartonshire Dumbarton Complex.

dumbarrassed

Never feel dumbarrassed by idiots.
dumbarrassed by jpg3 December 7, 2011